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#
# (C) Copyright IBM Corp. 2010, 2015
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
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#     http://www.apache.org/licenses/LICENSE-2.0
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args <- commandArgs(TRUE)
options(digits=22)

library("Matrix")

#note: we use matrix here, becase Matrix created out-of-memory issues
# 'Cholmod error 'out of memory' at file ../Core/cholmod_memory.c, line 147'
# however, R still fails with 'Error: cannot allocate vector of size 3.0 Gb'

A <- as.matrix(readMM(paste(args[1], "A.mtx", sep="")))
B <- as.matrix(readMM(paste(args[1], "B.mtx", sep="")))

C <- A %*% B;
#C <- A %o% B; 

cmin <- min(C);

writeMM(as(cmin, "CsparseMatrix"), paste(args[2], "C", sep="")); 


